$\bar{B}^{(\ast)} \bar{B}^{(\ast)}$ interactions in chiral effective field theory

Understand

In this work, the intermeson interactions of double-beauty $\bar{B}\bar{B}$, $\bar{B}\bar{B}^\ast$, and $\bar{B}^\ast\bar{B}^\ast$ systems have been studied with heavy meson chiral effective field theory.

• The effective potentials are calculated with Weinberg's scheme up to one-loop level.
• At the leading order, four body contact interactions and one pion exchange contributions are considered.
• In addition to two pion exchange diagrams, we include the one-loop chiral corrections to contact terms and one pion exchange diagrams at the next-to-leading order.